#include <iostream>
#include <string>

int main() {
	std::string str;
	int redc, bluc;
	while (std::cin >> str) {
		if (str ==  "RED") redc++;
		if (str == "BLUE") bluc++;
	}

	if (redc > bluc) {
		std::cout << "RED" << std::endl;
	}
	else {
		std::cout << "BLUE" << std::endl;
	}

	return 0;
}